(Hong Kong)
Product Summary
The FM31256 is an integrated device that includes the most commonly needed functions for processor-based systems. Major features of the FM31256 include nonvolatile memory available in various sizes, realtime clock, low-VDD reset, watchdog timer, nonvolatile event counter, lockable 64-bit serial number area, and general purpose comparator that can be used for an early power-fail (NMI) interrupt or other purpose. The FM31256 operates from 2.7 to 5.5V. The device provides nonvolatile RAM available in sizes including 4Kb, 16Kb, 64Kb, and 256Kb versions.
Parametrics
FM31256 absolute maximum ratings: (1)VDD, Power Supply Voltage with respect to VSS: -1.0V to +7.0V; (2)VIN, Voltage on any signal pin with respect to VSS: -1.0V to +7.0V and VIN ≤ VDD+1.0V; (3)VBAK, Backup Supply Voltage: -1.0V to +4.5V; (4)TSTG, Storage Temperature: -55 to +125℃; (5)TLEAD, Lead Temperature (Soldering, 10 seconds): 260℃; (6)VESD, Electrostatic Discharge Voltage: 100V; (7)Package Moisture Sensitivity Level: MSL-2.
Features
FM31256 features: (1)Serial Nonvolatile Memory; (2)Real-time Clock (RTC); (3)Low Voltage Reset; (4)Watchdog Timer; (5)Early Power-Fail Warning/NMI; (6)Two 16-bit Event Counters; (7)Serial Number with Write-lock for Security; (8)Active-low Reset Output for VDD and Watchdog; (9)Programmable VDD Reset Trip Point; (10)Manual Reset Filtered and Debounced; (11)Programmable Watchdog Timer; (12)Dual Battery-backed Event Counter Tracks System Intrusions or other Events; (13)Comparator for Early Power-Fail Interrupt; (14)64-bit Programmable Serial Number with Lock.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 FM31256-G |
Ramtron |
F-RAM 256K w/RTC Pwr Mon WDT Bat Sw PF |
Data Sheet |
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FM31256-GTR |
Ramtron |
F-RAM 256K w/RTC Pwr Mon WDT Bat Sw PF |
Data Sheet |
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FM31256-S |
Ramtron |
F-RAM 256K w/RTC Pwr Mon WDT Bat Sw PF |
Data Sheet |
Negotiable |
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FM31256-STR |
Ramtron |
F-RAM 256K w/RTC Pwr Mon WDT Bat Sw PF |
Data Sheet |
Negotiable |
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